diff --git a/src/db.cr b/src/db.cr
index b7d1f9b..ecadc3e 100644
--- a/src/db.cr
+++ b/src/db.cr
@@ -72,8 +72,10 @@ module DB
   # method to be used as query parameters
   TYPES = [Nil, String, Int32, Int64, Float32, Float64, Slice(UInt8)]
 
-  # See `DB::TYPES` in `DB`. `Any` is a nillable version of the union of all types in `DB::TYPES`
-  alias Any = Nil | String | Int32 | Int64 | Float32 | Float64 | Slice(UInt8)
+  # See `DB::TYPES` in `DB`. `Any` is a union of all types in `DB::TYPES`
+  {% begin %}
+    alias Any = Union({{*TYPES}})
+  {% end %}
 
   # Result of a `#exec` statement.
   record ExecResult, rows_affected : Int32, last_insert_id : Int64